let's go "outfront." hello, everyone. i'm in for erin burnett. "outfront," cnn is learning the engineer involve in the deadly train derail many in new york was, quote, nodding off and caught himself too late, unquote, to prevent the deadly crash. that's according to union representative anlth bottalico. according to investigators, he passed the breathalizer test but said he was in a daze and doesn't know what happened after the crash. the national transportation safety board said there was no problem with the brakes. four people were killed and at least 67 others were injured. some of them severely when the commuter train entered a sharp turn going 82 miles an hour in a 30-mile-per-hour zone. nic robson is at the crash site with the latest. >> reporter: human error, william billy rockefeller's daze, increasingly the probable cause. his union representative saying he was nodding off and caught himself too late. >> he is extremely distraught over it. and he feel for the families. i don't believe that in my opinion, anybody could ever make billy fee